METHOD FOR ADJUSTING LUMINANCE OF RGBW LIQUID CRYSTAL DISPLAY AND LIQUID CRYSTAL DISPLAY
A method for adjusting a luminance of a RGBW liquid crystal display is provided by the disclosure. The liquid crystal display includes a RGBW sub-pixel, wherein the luminance of the W sub-pixel is achieved by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of a sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, and aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel. A liquid crystal display is also provided by the disclosure, and the method for adjusting the luminance of the RGBW liquid crystal display is applicable for the luminance of the W sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
The present application is a National Phase of International Application Number PCT/CN2017/116041, filed Dec. 14, 2017, and claims the priority of China Application No. 201711043041.9, filed Oct. 31, 2017.
FIELD OF THE DISCLOSUREThe disclosure relates to a display panel technology, and particularly to a method for adjusting a luminance of a RGBW liquid crystal display and a liquid crystal display.
BACKGROUNDThere is a RGB three colors display system in a liquid crystal display. However, with the improvement of resolution, a luminous efficiency of the liquid crystal display is required to improve so as to attain the purposes of low power consumption and high luminance, especially for products having the resolution of 4K and the above, and thus a RGBW four colors display system is put forward. The RGBW four colors system has not only a red sub-pixel (R), a green sub-pixel (G) and a blue sub-pixel (B), but also includes a luminance enhanced sub-pixel (W), so that all functions realizable by the RGB three colors system can be completely fulfilled, and has advantages such as high luminous efficiency and lower power consumption. However, the incorporation of a W sub-pixel also causes optical problems such as reduced color saturation of the liquid crystal displays, coordinate shift of white point color and the like. However, in some displays having too high PPI (4K resolution or above) and suitable for outdoors, the incorporation of the W sub-pixel fails to sufficiently fulfill the purpose of the increase in the luminous efficiency.
SUMMARYIn order to overcome disadvantages in the prior art, the disclosure provides a method for adjusting a luminance of a RGBW liquid crystal display and a liquid crystal display, so as to improve the application range, display quality and visual comfort of the liquid crystal displays having the RGBW four colors display system.
The disclosure provides a method for adjusting a luminance of a RGBW liquid crystal display, wherein the liquid crystal display includes a RGBW sub-pixel, wherein the luminance of the W sub-pixel is achieved by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of a sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, and aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel.
Further, the adjusting the width of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the width of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the width of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the spacing of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the spacing between branches of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the spacing between branches of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the thickness of the liquid crystal cell of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a height at the sub-pixel electrode corresponding to the W sub-pixel as higher than or lower than a height at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the number of branch of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, and/or setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, or setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Further, the adjusting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the aperture ratio at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
The disclosure also provides a liquid crystal display including a color filter substrate and an array substrate. The color filter substrate includes a RGBW sub-pixel, and the array substrate includes a sub-pixel electrode corresponding to the RGBW sub-pixels, and a method for adjusting a luminance of the RGBW liquid crystal display is applicable for the luminance of the W sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Compared with the prior art, the disclosure achieves the adjustment of the luminance of the W sub-pixel by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of the sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, and aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel, and overcomes the detects of liquid crystal displays having a RGBW four colors display system, expands advantages of the liquid crystal displays having the RGBW four colors display system and improves the application range, display quality and visual comfort of the liquid crystal displays having the RGBW four colors display system.
The disclosure is further described below in detail in combination with the accompanying drawings and embodiments. The disclosure, however, may be embodied in various different forms, and should not be construed as being limited to the illustrated specific embodiments herein. Rather, these embodiments are provided to explain principles of the disclosure and actual application thereof, so that a person skilled in the art can understand the various embodiments of the disclosure and various modifications used for the particular intended application.
The disclosure discloses a method for adjusting a luminance of a RGBW liquid crystal display. The liquid crystal display includes a RGB W sub-pixel, wherein the luminance of the W sub-pixel is achieved by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of a sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel, wherein
adjusting the width of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the width of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the width of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel;
adjusting the spacing of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the spacing between branches of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the spacing between branches of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel;
adjusting the thickness of the liquid crystal cell of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a height at the sub-pixel electrode corresponding to the W sub-pixel as higher than or lower than a height at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel;
adjusting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the number of branch of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel;
adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel and/or setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel. Optionally, setting the width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, or setting the length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel. The width of the channel region refers to a length that a carrier in a TFT (Thin-film transistor) flows, and the length of the channel region refers to a cross-sectional area that a carrier in TFT (Thin-film transistor) flows.
Adjusting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the aperture ratio at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel. Specifically, the adjustment of the aperture ratio at W sub-pixel is achieved by changing the area of the W sub-pixel. As an embodiment, the area of the W sub-pixel may be realized by widening a line width of a black matrix in the W sub-pixel region.
During the adjustment of the luminance of the W sub-pixel in the disclosure, when the W sub-pixel in the disclosure has higher luminance than that of a routine W sub-pixel, the disclosure may be suitable for a first applicable scene. In the first applicable scene, the W sub-pixel is designed to have higher luminous efficiency, better attain low power consumption and high luminance of the liquid crystal display, and be usable for outdoor display/wording display and the like. When the W sub-pixel in the disclosure has less luminance than that of the routine W sub-pixel, the disclosure may be used for a second applicable scene and the W sub-pixel is designed to have less luminous efficiency, reduce optical problems such as the decrease of color saturation and coordinate shift of white point color due to the incorporation of the W sub-pixel, and be used for a. liquid crystal display demanding an image quality and having indoor display/picture display and the like.
Embodiment IAs shown in
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In Embodiment III, the number of branches and the spacing of the sub-pixel electrode corresponding to the RGBW sub-pixels is the same.
Embodiment IVAs shown in
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In Embodiment V, the spacing, width and electrode pattern of the sub-pixel electrode corresponding to the RGBW sub-pixels is all the same.
Embodiment VIAs shown in
The raised platform 205 may be obtained by etching the over coat 203 in the region outside the sub-pixel electrode 201 corresponding to the W sub-pixel 101. However, the disclosure is not limited thereto. For example, the raised platform 205 may be obtained by depositing and etching an insulating layer in the region outside the sub-pixel electrode 201 corresponding to the W sub-pixel 101.
In Embodiment VI, the spacing, width and electrode pattern of the sub-pixel electrode corresponding to the RGBW sub-pixels is all the same.
In the disclosure,
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The disclosure may also combine with two or more of Embodiments I-XII, thereby further meeting the requirements for the luminance of the W sub-pixel. The description thereof is omitted.
In the above Embodiments I-XII, the liquid crystal displays are FFS (Fringe Field Switching) mode of liquid crystal displays. Other modes of liquid crystal displays may obtain a design having brighter or darker W sub-pixel than that in a routine design using the methods of Embodiments I-XII. For example, the sub-pixel electrode corresponding to the W sub-pixel has a smaller area in a VA (Vertical Alignment) mode of liquid crystal display. The disclosure makes no limitation on display mode of liquid crystal displays.
As shown in
Although the disclosure has been described with reference to the specific embodiments and drawings, it is to be understood by a person skilled in the art that the various changes in the forms and details may be made without departing from the spirit and the scope of the disclosure defined by the claims and the equivalents thereof.
Claims
1. A method for adjusting a luminance of a RGBW liquid crystal display, wherein the liquid crystal display comprises a RGBW sub-pixel, wherein the luminance of the W sub-pixel is achieved by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of a sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, and aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel.
2. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the width of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the width of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the width of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
3. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the spacing of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the spacing between branches of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the spacing between branches of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
4. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the thickness of the liquid crystal cell of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a height at the sub-pixel electrode corresponding to the W sub-pixel as higher than or lower than a height at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
5. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the number of branch of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
6. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, or setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
7. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, and setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
8. The method for adjusting the luminance of the RGBW liquid crystal display according to claim 1, wherein the adjusting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the aperture ratio at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
9. A liquid crystal display, comprising a color filter substrate and an array substrate, and the color filter substrate comprising a RGBW sub-pixel, and the array substrate comprising a sub-pixel electrode corresponding to the RGBW sub-pixels, wherein a method for adjusting a luminance of the RGBW liquid crystal display is applicable for the luminance of the W sub-pixel for achieving the adjustment of the luminance of the W sub-pixel; the liquid crystal display in the method for adjusting the luminance of the RGBW liquid crystal display comprises the RGBW sub-pixel, wherein the luminance of the W sub-pixel is achieved by adjusting one or more of width, spacing, thickness of liquid crystal cell, and number of branch of a sub-pixel electrode corresponding to the W sub-pixel, channel region at the sub-pixel electrode corresponding to the W sub-pixel, and aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel.
10. The liquid crystal display according to claim 9, wherein the adjusting the width of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the width of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the width of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
11. The liquid crystal display according to claim 9, wherein the adjusting the spacing of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the spacing between branches of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the spacing between branches of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
12. The liquid crystal display according to claim 9, wherein the adjusting the thickness of the liquid crystal cell of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a height at the sub-pixel electrode corresponding to the W sub-pixel as higher than or lower than a height at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
13. The liquid crystal display according to claim 9, wherein the adjusting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the number of branch of the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the number of branch of the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
14. The liquid crystal display according to claim 9, wherein, the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, or setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
15. The liquid crystal display according to claim 9, wherein the adjusting the channel region at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting a width of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a width of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel, and setting a length of the channel region at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than a length of the channel region at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
16. The liquid crystal display according to claim 9, wherein the adjusting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel is specifically by setting the aperture ratio at the sub-pixel electrode corresponding to the W sub-pixel as greater than or smaller than the aperture ratio at the sub-pixel electrode corresponding to the RGB sub-pixel for achieving the adjustment of the luminance of the W sub-pixel.
Type: Application
Filed: Dec 14, 2017
Publication Date: Jan 30, 2020
Inventors: Yuejun TANG (Wuhan, Hubei), Yang CHEN (Wuhan, Hubei), Xiaohui JIANG (Wuhan, Hubei), Dandan LIU (Wuhan, Hubei)
Application Number: 15/740,186